Add allocation tests

Author: blegat

test/Nonlinear/ReverseAD.jl

@@ -153,24 +153,18 @@ function test_objective_quadratic_multivariate_subexpressions()
     @test evaluator.backend.max_chunk == 2
     # The call of `_eval_hessian_inner` from `_eval_hessian` needs dynamic dispatch for `Val(chunk)` so it allocates.
     # We call directly `_eval_hessian_inner` to check that the rest does not allocates.
-    @test @allocated MOI.Nonlinear.ReverseAD._eval_hessian_inner(evaluator.backend, evaluator.backend.objective, H, 1.0, 0, Val(2))
+    @test 0 == @allocated MOI.Nonlinear.ReverseAD._eval_hessian_inner(evaluator.backend, evaluator.backend.objective, H, 1.0, 0, Val(2))
     @test MOI.hessian_lagrangian_structure(evaluator) ==
           [(1, 1), (2, 2), (2, 1)]
     H = [NaN, NaN, NaN]
-    MOI.eval_hessian_lagrangian(evaluator, H, val, 1.5, Float64[])
+    μ = Float64[]
+    MOI.eval_hessian_lagrangian(evaluator, H, val, 1.5, μ)
     @test H == 1.5 .* [2.0, 2.0, 1.0]
-    MOI.eval_hessian_lagrangian(evaluator, H, val, 1.5, Float64[])
     v = [0.3, 0.4]
     hv = [NaN, NaN]
-    MOI.eval_hessian_lagrangian_product(
-        evaluator,
-        hv,
-        [1.2, 2.3],
-        v,
-        1.5,
-        Float64[],
-    )
+    MOI.eval_hessian_lagrangian_product(evaluator, hv, val, v, 1.5, μ)
     @test hv ≈ 1.5 .* [2 1; 1 2] * v
+    @test 0 == @allocated MOI.eval_hessian_lagrangian_product(evaluator, hv, val, v, 1.5, μ)
     return
 end